C1111233131211111211113313331333133313231323331333133313331221121   >>    C111123313121111121111331333133313331323132333133313331333122112   <<    C1111233131211111211113313331333133313231323331333133313331221123   >>      C1111233131211111211113313331333133313231323331333133313331221122   >>